The tomographic formulation of spotlight mode synthetic aperture radar extended to three dimensional targets

Conference · Mon Jun 01 00:00:00 EDT 1992

OSTI ID:10149271

Jakowatz, Jr, C V; Thompson, P A

In this paper we take a new look at the tomographic formulation of spotlight mode synthetic aperture radar (SAR), so as to include the case of targets having three-dimensional structure. This bridges the work of David C. Munson and his colleagues, who first described SAR in terms of two-dimensional tomography, with Jack Walker`s original derivation of spotlight mode SAR imaging via Doppler analysis. The main result is to demonstrate that the demodulated radar return data from a spotlight mode collection represent a certain set of samples of the three-dimensional Fourier transform of the target reflectivity function, and to do so using tomographic principles instead of traditional Doppler arguments. We then show that the tomographic approach is useful in interpreting the two-dimensional SAR image of a three-dimensional scene. In particular, the well-known SAR imaging phenomenon commonly referred to as layover is easily explained in terms of tomographic projection. 4 refs.

• Research Organization: Sandia National Labs., Albuquerque, NM (United States)
• Sponsoring Organization: USDOE, Washington, DC (United States)
• DOE Contract Number: AC04-76DP00789
• OSTI ID: 10149271
• Report Number(s): SAND-92-1045C; CONF-9209114-1; ON: DE92013666
• Resource Relation: Conference: Digital signal processing workshop,Starved Rock, IL (United States),15 Sep 1992; Other Information: PBD: [1992]
• Country of Publication: United States
• Language: English

Related Subjects

42 ENGINEERING
99 GENERAL AND MISCELLANEOUS//MATHEMATICS, COMPUTING, AND INFORMATION SCIENCE
SYNTHETIC-APERTURE RADAR
MATHEMATICAL MODELS
IMAGE PROCESSING
FOURIER TRANSFORMATION
COMPUTERIZED TOMOGRAPHY
THREE-DIMENSIONAL CALCULATIONS
INTEGRAL EQUATIONS
SIGNALS
420200
990200
FACILITIES, EQUIPMENT, AND TECHNIQUES
MATHEMATICS AND COMPUTERS